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Europium Oxide-Hematite Magnetic Ceramic Nanoparticles

Published online by Cambridge University Press:  21 December 2015

Monica Sorescu ,
Lucian Diamandescu ,
John DiGnazio  and
Tianhong Xu
Monica Sorescu*
Affiliation:
Duquesne University, Department of Physics, Fisher Hall, Pittsburgh, PA 15282, USA
Lucian Diamandescu
Affiliation:
National Institute of Materials Physics, P.O. Box MG-7, 077125 Bucharest-Magurele, Romania
John DiGnazio
Affiliation:
Duquesne University, Department of Physics, Fisher Hall, Pittsburgh, PA 15282, USA
Tianhong Xu
Affiliation:
Duquesne University, Department of Physics, Fisher Hall, Pittsburgh, PA 15282, USA FlexEl, LLC, 387 Technology Drive, College Park, MD 20742, USA
*
*(Email: sorescu@duq.edu)
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Abstract

Nanoparticle system with the composition xEu2O3-(1-x)α-Fe2O3 (x = 0.1 and 0.5) was successfully synthesized by mechanochemical activation of Eu2O3 and α-Fe2O3 mixtures for 0-12 hours of ball milling time. The study is of relevance to catalysis, biomedical, sensing and energy-related applications. 57Fe and 151Eu Mössbauer spectroscopy were used to investigate the phase evolution, solid solution formation and hyperfine parameters of xEu2O3-(1-x)α-Fe2O3 nanoparticle system under the mechanochemical activation process. The 57Fe Mössbauer studies showed that the spectrum of the ball milled samples evolved from a sextet for hematite to sextets and a doublet upon duration of the milling process with europium oxide. This indicated the formation of the EuFeO3 perovskite for large x values and long milling times. The 151Eu Mössbauer investigations showed that the isomer shift decreased with increasing milling time for all molar concentrations employed.

Keywords

magnetic propertiesmechanical alloyingM"ssbauer effect
Type
Articles
Information
MRS Advances , Volume 1 , Issue 3: Nanomaterials and Synthesis , 2016 , pp. 215 - 220
Copyright
Copyright © Materials Research Society 2015 

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References

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